Heat exchanger



Nam 1932. .1. H. SCHACHT-ET AL HEAT EXCHANGER Filed Jan. 20, 1932 cf 22 ff. dcfiadzi Jamie? fifafmz'zerr Patented Nov. 1%, 1932 nearer arr 1 HEAT 'nxonaivenn Application filed .s'anuary 20, 1832. Serial No. 587,818.

This invention relates to heat exchange and has special reference to a heatexchanging unit or heat exchanger.

One important object of the invention is to provide a novel heat exchanging unit of simple and practical construction.

A second important object of the invention is to provide a novel heat engaging unit of high efficiency, the unit being arranged to in provide a large heat exchanging area while, at the same time, the cubical space occupied is relatively small.

A third important object of the invention is to provide a unit for this purpose which may be very economically constructed.

lVith the above and other objects in view the invention consists in general of certain novel details of construction and combinations of parts hereinafter more fully de- 56 scribed, illustrated in the accompanying drawing and specifically claimed.

In the accompanying drawing, like charactors of reference indicate like parts in the several views, and

Figure 1 is a front elevation of the unit;

Figure 2 is a side or edge view of the unit showing the unit in its housing, the latter being shown in section;

Figure 3 is a detail perspective view of a portion of a slight modification of each unit and its housing;

Figure l is a detail section on the line it- 1 of Figure 1.

In the embodiment of the invention as here disclosed, the heat exchanging unit has a back plate 10 provided with raised peripheral portions 11 having outwardly extending flanges 12; The unit also has a front plate 13 provided with raised peripheral portions 1 having outwardly extending flanges 15 which rest on the flanges 12 of the back plate so that the major portions of the front and back plates are in spaced relation. Also the front plate has slits 16 extending alter- 5 nately from its bottom andtop edge and terminating in spaced relation to the edges opposite those from which they extend. The portions of the front plate at the sides and inner ends of these slits are offset toward the back plate as at 16 and are provided with flanges 17 resting on the back plate. The flanges 12 and 15 are suitably secured together as by a channel member 18or they may be welded or riveted together. Similarly, the flanges 17 are welded or riveted to the back plate. As seen in Figure 1 the parts 16 f'orm a passageway between the front and back plates so that a fluid may flow through the unit in alternate up and down directions as shown by the arrows in Figure 1. An inlet nipple 19 is provided at the inlet end of the passage thus formed and an outlet nipple 20 is connected to the outlet end of said passage.

Preferably, the unit thus formed is longitudinally corrugated so as to present in cross section a vertical zigzagged structure.

This unit is supported in a housing having a front wall 21 and a rear wall 22 which are spaced somewhat from the adjacent convex sides of the bends or corrugations. The front wall 21 has an inlet opening 23 at'its bottom and the back wall 22 has an outlet opening 24 at its top. The lower end of the unit is spaced from the bottom of the housing and the upper end of the unit is spaced below the top of the housing so that air or other fluid can flow along both sides of the unit as shown by the arrows in Figure 2, the corrugations causing eddies to form which retard the flow and afford ample time for heat transference. Moreover, this action may be assisted by longitudinal corrugations 25 formed in the walls 21 and 22 and projecting inwardly toward the convex sides of the corrugations of the unit.

As a concrete example of the manner in which the device may be used we may suppose that it is desired to cool a quantity of air. By any suitable means, such as an emmonia gas refrigerating plant, a cold fluid is passed through the unit, entering at the nipple 19 and exhausting at the nipple 20. By suitable means air is caused to enter the opening 23 and this air will flow up the unit on both sides, losing heat to the unit as it moves along, until it passes out through the opening 24. Thus, the air will be cooled and, by regulating the relative volumes of the cooling medium and air passing through the device, the

temperature of the outflowing air may be regulated.

Obviously the fluid flowing through the heat transferring unit may be hotter than air if it be desired to heat such air. It will also be obvious that other fluids than air may be passed through the housing to be cooled or heated -as desired. a

It isitoi-be observed that with this construction of unit the walls may be made of sheet metaland thus be made thin enough to form little resistance to the passage of heat between the fluid in the unit and that outside the unit.

There has thus been provided a simple and efli cient device ofth'e kind described and for the purpose specified.

t is obvious that changes may be made in the form and construction of theinvention without departing from the principles involved. It is not therefore desired to confine the invention to the exact form herein shown and described but it is desired to include all such as come within the scope claimed.

We Claim:

1. A heat transfer unit consisting of a pair of spaced plates forming front and rear walls and connected at their edges, one of said plates having slits extending alternately from opposite edges of the plates, said slits terminating in spaced relation to the edges opposite those from which they extend, the slitplate at the sides and ends of the slits being bent into contact with the other plate and there secured to form a passageway, an inlet nipple at one end of thepassageway, and an outlet nipple at the other end of said passageway, said plates being corrugated in a direction transverse the direction of flow of fluid through the unit, in combination with a housing for said unit having front and rear walls close to the convex sides of the corrugations and provided with an inlet adjacent one edge of the unit and an outlet adjacent the opposite edge of the unit and on the'side of the unit oppositethe inlet.

2. A heat transfer unit consisting of a pair of spaced plates forming front and rear walls and connected at their edges, one of said plates having transversely extending portions bent toward the other plate and secured thereto to form a passageway, and nipples on opposite sides of said passageway, said plates being corrugated in a direction transverse the directionof flow of fluid through the unit, in combination with a housing for said unit having front and rear walls close to the convex sides of the corrugations and provided with an inlet adjacent one edge of the unit and an outlet adjacent the opposite edge of the unit and on the side of the unitopposite the inlet, said housing having corrugations on its front and back walls extending inwardly from said walls parallel to the corrugations of the unit and opposite the concave sides of said unit corrugations.

3'. A heat transfer unit consisting of a pair of spaced plates forming front and rear walls and connected at their edges, one of said plates having slits extending alternately from opposite edges of the plates, said slits terminating in spaced relation to the edges opposite those from which they extend, the slit plate at the side's and ends of the slits being bent into contact with the other plate and there secured to form a passageway, an inlet nipple at one end of the passageway, and an outlet nipple at the other end of said passageway said plates being corrugated in a direction transverse the direction of flow of fluid through the unit, in combination with a housmg for said unit having front and rear walls close to the convex sides of the corrugations and provided with an inlet adjacent one edge of the unit and an outlet adjacent the opposite edge of the unit and on the side of the unit opposite the inlet, said housing having corrugations on itsfront and back walls extending inwardly from said walls parallel to the corrugations of the unit and opposite the concave sides of said unit corrugations.

In testimony whereof we afix our signatures.

JOHN H. SCI-IAGHT. DANIEL A. PALMITER. 

